NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1639353394 N.P.
Verify on CMS → Janice Grigsby, N.P.
Family Nurse Practitioner in Maryville, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 210,832 in Family Nurse Practitioner, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
What the federal data shows
Janice Grigsby, N.P. is a Family Nurse Practitioner in Maryville, Tennessee, listed in the federal CMS National Provider Identifier registry.
- #1
- Family Nurse Practitioner rank among Tennessee specialties
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
CMS NPPES provider registry desk
NPI 1639353394 · Family Nurse Practitioner
NPI-10 · ENUM-MID · TAX-MEGA · RX-NONE · BOOK-MID · PHOTO-ENUM
- NPI-10 1639353394
- ENUM-MID 2007
- TAX-MEGA 211K Family Nurse
- RX-NONE No Part D
- BOOK-MID 7,834 in Tennessee
- PHOTO-ENUM Jean Kanidis · 2007
What does the federal data show about Janice Grigsby, N.P.?
Quality data not reportedPrimary specialty
Family Nurse Practitioner
Specialty distribution in Tennessee
How Family Nurse Practitioner compares to other specialties among Tennessee providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Family Nurse Practitioner. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1639353394 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | N.P. |
| Gender | Female |
| NPI Issued | 12/18/2007 |
Family Nurse Practitioner Overview
How Janice Grigsby, N.P. fits within the Family Nurse Practitioner landscape nationally.
210,832
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Nationwide Family Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Grigsby, both outside Tennessee so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Nurse Practitioner Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Grigsby.
One of 7,834 Family Nurse Practitioner providers enrolled in Tennessee, 5 are shown here.
Dr. Benjamin Aaron
FNP-C
Cookeville, TN
Dr. Sandra Aaron
FNP-BC
Ooltewah, TN
Dr. Jessica Abbott
FNP
Nashville, TN
Keshia Abbott
Cookeville, TN
Shelton Abbott
Johnson City, TN
Compare Family Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Janice Grigsby, N.P.'s specialty? ▼
Janice Grigsby, N.P. specializes in Family Nurse Practitioner and practices in Maryville, Tennessee. Credentials: N.P..
Where is Janice Grigsby, N.P. located? ▼
Janice Grigsby, N.P. is located at 301 MCGHEE ST, Maryville, TN, 37801. Phone: (865) 983-4582.
What is Janice Grigsby, N.P.'s NPI number? ▼
Janice Grigsby, N.P.'s National Provider Identifier (NPI) is 1639353394, issued on 12/18/2007.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 210,832 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
Does Janice Grigsby, N.P. accept Medicare? ▼
Janice Grigsby, N.P. appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Janice Grigsby, N.P.'s credentials? ▼
Janice Grigsby, N.P.'s NPI is 1639353394 with credentials N.P.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.